Well, on Bitcointalk the reviews are legit and even the paid ones are legit ones. The reviews aren't positive always, sometime they have cons as well, and that shows the reviews on Bitcointalk are legit ones.

Surely, paid reviews always have to be positive but someone should understand the difference between a legit review and a not legit one by reading the review.

If a review doesn't contain someone weakness of a platform then that's most probably a positive review, and should be not considered a legit review but if it's still written by someone who found perks of a platform then still that review can be helpful one.